Patent US1735660A successfully refreshed from Google Patents.
Patent US3036143A successfully refreshed from Google Patents.
US3036143A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery separators
Assignee: WR Grace and Co
•
Filing: 1958-01-08
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Granted: 1962-05-22
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Expires: 1978-01-08
Abstract
No abstract record available.
Inventors
- 👤 Arthur L Fisher
- 👤 Roy D Fountain
- 👤 Richard W Schweizer
- 👤 John R Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:40
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/40; H01M50/489; H01M50/409; H01M50/411; H01M50/414; H01M50/429; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A PLATE SEPARATOR FOR USE IN ELECTRIC STORAGE BATTERIES HAVING ATTACHED TO AT LEAST ONE FACE THEREOF SOLID RIBS FORMED OF AN EXPANDABLE ACID-RESISTANT RESIN COMPOSITION CONTAINING A DRY PARTICULATE, UNSWOLLEN MINERAL FILLER EMBEDDED THEREIN SUCH THAT SUBSTANTIALLY THE ENTIRE SURFACE AREA OF EACH PARTICLE OF THE FILLER WHICH IS NOT AT THE OUTER SURFACE OF A RIB IS IN PHYSICAL CONTACT WITH THE RESIN, SAID MINERAL FILLER BEING CHARACTERIZED BY ITS ABILITY TO SWELL UPON CONTACT WITH BATTERY ACID SOLUTION WHEREBY IMMERSION OF THE SEPARATOR IN SUCH SOLUTION WILL RESULT IN SUBSTANTIAL PHYSICAL EXPANSION OF THE RIBS.
Claim 2
Dependent Claim
98 words
A PLATE SEPARATOR FOR USE IN ELECTRIC STORAGE BATTERIES HAVING ATTACHED TO AT LEAST ONE FACE THEREOF SOLID RIBS FORMED OF AN EXPANDABLE ACID-RESISTANT RESIN COMPOSITION CONTAINING A DRY PARTICULATE, UNSWOLLEN MINERAL FILLER EMBEDDED THEREIN SUCH THAT SUBSTANTIALLY THE ENTIRE SURFACE AREA OF EACH PARTICLE OF THE FILLER WHICH IS NOT AT THE OUTER SURFACE OF A RIB IS IN PHYSICAL CONTACT WITH THE RESIN, SAID MINERAL FILLER BEING CHARACTERIZED BY ITS ABILITY TO SWELL UPON CONTACT WITH BATTERY ACID SOLUTION WHEREBY IMMERSION OF THE SEPARATOR IN SUCH SOLUTION WILL RESULT IN SUBSTANTIAL PHYSICAL EXPANSION OF THE RIBS.
References Cited (Backward Citations)
US1495568A
Cited
US1786328A
Cited
FR834629A
Cited
US2526591A
Cited
US2681377A
Cited
US2772322A
Cited
US2936328A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-21 | 1965-11-20 | 1966-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-21 | 1969-11-20 | 1970-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-21 | 1973-11-20 | 1974-05-22 | $7700.00 | Window Closed / Lapsed |